An Art Deco necklace.  Disks of green and white glass are strung with white metal spacer bars - so the 2 rows sit together.  The green row also has white metal disks - to make it longer than the inner row.  I had to rethread this necklace as it badly needed it (and what a tedious job it was - just not the easiest!).  It is for quite a small neck - measuring approx 15 inches.  It is now in a good condition and is a interesting example of the Art Deco period combining glass and white metal (probably chrome - but I am not sure).  Ref: 964